SCSI to IDE bridges...

Jeff Walther trag at
Tue Sep 23 14:49:06 CDT 2008

> Date: Tue, 23 Sep 2008 09:40:10 -0700 (PDT)
> From: "Zane H. Healy" <healyzh at>

>> Al, the auction link I posted was for a standard 50 pin to IDE interface
>> for $30.  As of the time I posted the message he had 525 of them left.
>> Buy 'em now before you need 'em. :)
> That's a **** good price!  I don't need Narrow SCSI anywhere near as much
> as I need newer versions, but I'm still considering buying some.  This
> could be a good way to get a cheap *BIG* disk on a VMS system for backing
> up the SCSI disks to.  Anyone happen to know how large of disks these
> support?

Information about the Acard AEC-7720U is available on Acard's website:

The 7720U includes mumble-HBA support so it does support large drives over
128 GB or 137 GB or whatever that limit is.  Of course some older
computers do not support partitions that large.  For example, a 750 GB
drive on a Mac SE/30 would need the drive broken into 375 partitions...

> Any idea if this outfit combines shipping?  They're charging a pretty high
> shipping cost for something like this.

I don't know if they combine shipping.  $10 for shipping does seem
excessive, especially since the things don't weigh anything.

Also, those are used 7720Us and do not include the power dongle.  However,
the power dongle is simply a 'Y' splitter which terminates in a regular
hard drive power connector and a floppy drive power connector.  Your hard
drive needs a power connector of course, and the 7720U draws its power
from a floppy style connector.

That style of splitter is getting harder to find, but many of the folks on
this list may have them on hand--or a regular two-hard drive splitter and
a hard drive to floppy drive power adapter.

Oh, and the Ebay guy doesn't ship internationally.

I'm  not trying to be discouraging; it's still a very good price, but
there are some details buyers should be aware of.  I feel free to point
these things out since I sold the last of my *new* 7720Us ($39 + $4.85
shipping with power dongle) a couple of weeks ago.  :-)

Jeff Walther

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